Text and Data Mining valid from 2020-02-10
Received: 30 May 2019
Accepted: 26 January 2020
First Online: 10 February 2020
Compliance with ethical standards
: All authors declare that they have no conflicts of interest.
: All of the procedures performed in studies involving human participants were carried out in accordance with the ethical standards of the relevant institutional and/or national research committees (institutional review board approval number: 1026) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in this study.